Thermal indicator for vacuum sterilizer test packs



FIG. 1 is a top plan view of a thermal indicator for vacuum sterilizer test packs showing my new design;

FIG. 2 is a typical side elevational view thereof;

FIG. 3 is an enlarged cross-sectional view thereof as taken from line 3--3 of FIG. 1;

FIG. 4 is a top plan view thereof after exposure in a vacuum sterilizer;

FIG. 5 is another embodiment of my new design of FIGS. 1-4. 

The ornamental design for a thermal indicator for vacuum sterilizer test packs, as shown and described. 